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Edexcel IGCSE Chemistry 2 Inorganic Chemistry Questions

Practise inorganic chemistry across groups, gases, metals, acids and tests using observations, tables, equations and reactivity evidence.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Covered syllabus points

(a) Group 1 (alkali metals) – lithium, sodium and potassium(b) Group 7 (halogens) – chlorine, bromine and iodine(c) Gases in the atmosphere(d) Reactivity series(e) Extraction and uses of metals(f) Acids, alkalis and titrations(g) Acids, bases and salt preparations(h) Chemical tests

Question 1

[Maximum number: 4]

The diagram shows the positions of some elements in part of the Periodic Table.

Na Al S Cl
K Xe
In

Table for Question 1 — Edexcel IGCSE Chemistry

Question (a)

(a)

A teacher adds a small piece of sodium to a glass trough containing water and universal indicator.

The universal indicator changes colour.
The equation for the reaction is

2Na( s)+2H2O(l)→2NaOH(aq)+H2( g)2 \mathrm{Na}(\mathrm{~s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow 2 \mathrm{NaOH}(\mathrm{aq})+\mathrm{H}_{2}(\mathrm{~g})
[ 4 ]

Question (i)

(i)

Explain the final colour of the universal indicator.

[ 2 ]

Question (ii)

(ii)

The teacher repeats the experiment with potassium instead of sodium.

Give one similarity and one difference observed with potassium.
similarity
difference

[ 2 ]

Question 2

[Maximum number: 8]

This question is about elements in Group 7 and their compounds.
The table gives information about some of these elements.

Table for Question 2 — Edexcel IGCSE Chemistry

Question (a)

(a)

Predict the colour of fluorine at room temperature.

[ 1 ]

Question (b)

(b)

How many of the elements in the table are liquids at room temperature (20∘C)\left(20^{\circ} \mathrm{C}\right) ?

A

0

B

1

C

2

D

3

[ 1 ]

Question (c)

(c)

The element astatine is below iodine in Group 7.

Predict the formula of a molecule of astatine.

[ 1 ]

Question (d)

(d)

Sea water contains bromide ions.

Bromine can be obtained by bubbling chlorine through a sample of sea water.
The ionic equation for the reaction is

Cl2( g)+2Br−(aq)→2Cl−(aq)+Br2(aq)\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{Br}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{Cl}^{-}(\mathrm{aq})+\mathrm{Br}_{2}(\mathrm{aq})
[ 5 ]

Question (i)

(i)

Explain which species acts as an oxidising agent in this reaction.

[ 2 ]

Question (ii)

(ii)

The reaction occurs because chlorine is more reactive than bromine.

Bromine is below chlorine in Group 7.
Explain the decrease in reactivity from chlorine to bromine.

[ 3 ]

Question 3

[Maximum number: 3]

This question is about gases.

Question (a)

(a)

The table gives information about five gases.

Table for Question (a) — Edexcel IGCSE Chemistry

Use information from the table to answer these questions.
Each gas may be used once, more than once or not at all.

[ 3 ]

Question (i)

(i)

Give the name of the gas that is about 79% of the atmosphere by volume.

[ 1 ]

Question (ii)

(ii)

Give the name of the gas that is not normally found in the atmosphere.

[ 1 ]

Question (iii)

(iii)

Give the name of the gas that affects global warming.

[ 1 ]

Question 4

[Maximum number: 5]

The reactions of metals with water and with dilute sulfuric acid can be used to determine the order of reactivity of the metals.

The table shows the reactions of four metals, W, X, Y and Z, with water and with dilute sulfuric acid.

Table for Question 4 — Edexcel IGCSE Chemistry

Question (a)

(a)

What is the order of reactivity of these metals?

Figure for Question (a) — Edexcel IGCSE Chemistry
[ 1 ]

Question (b)

(b)

State which metal, W, X, Y or Z, could be copper.

[ 1 ]

Question (c)

(c)

State which metal, W, X, Y or Z, could be magnesium.

[ 1 ]

Question (d)

(d)

A displacement reaction can also be used to decide the order of reactivity of two metals.

State two observations made when an excess of magnesium powder is added to an aqueous solution of copper(II) sulfate.

1 ............
2 ............

[ 2 ]
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